Represents a tuple stored in the data layer as a map.

A builtin type that can be referenced via :tuple

• :fields (keyword/0) - Required. The types of the fields in the tuple, and their constraints.
  This type is stored as a map under the hood, keyed by the field name, and is represented in memory as a tuple.
  For example:

  fields:  [
    amount: [
      type: :integer,
      description: "The amount of the transaction",
      constraints: [
        max: 10
      ]
    ],
    currency: [
      type: :string,
      allow_nil?: false,
      description: "The currency code of the transaction",
      constraints: [
        max_length: 3
      ]
    ]
  ]  

  allow_nil? is true by default

  • :type (an Ash.Type) - Required.

  • :allow_nil? (boolean/0) - The default value is true.

  • :description (String.t/0)

  • :constraints (keyword/0) - The default value is [].